Process for forging valves and similar articles



E. FUCHS. PROCESS FOR FORGING VALVES AND SIMILAR ARTICLES.

APPLICATION FILED NOV-15,1918.

Patented Sept. 7, 1920.

ERNEST FUCHS, OF PARIS, FRANCE, ASSIGNOR TO LOUIS SEINE, FRANCE.

PROCESS FOR'FORGIN G VALVES AND SIMILAR ARTICLES.

Specification of Letters Patent.

Patented Sept. 7, 1920.

Application filed November 15, 1918. Serial No. 262,685.

To all whom it may concern Be it known that I, ERNEST FUCHS, of 111 Boulevard Exelmans at Paris, Department of the Seine, in France, citizen of the French Republic, have invented certain new and useful Improvements in Processes for Forging Valves and Similar Articles; and I do hereby declare the following to bee full, clear, and exact description of the invention, such as will'enable others skilled in the art to which it appertains to make and use the same.

The forging of valves for motors and similar articles is actually effected by means of several'difi'erent processes either by thickening up the end of a rod by forcing back to produce the head as in the manufacture of bolts, or by drawing a piece of suitable section, or a combination of the two processes which consists in taking a section. of metal between the size of the rod and the head, drawing the head.

The process forming the subject matter of the present invention consists in obtaining valves and similar objects comprising a head and an endpiece, such as bolts, rivets, etc., starting with a section of metal the diameter ofwhich is between the diameters.

of the head and end piece, the forging being effected in two operations, 2'. e.

(1 Drawing of the end piece, by pressing the hot metal through a suitable drawlate. p (2) Forming the head by pressing it between a die and a suitable press-tool. F igurcs 1, 2 and 3 show the three stages of manufacture of the valve.

Fig. 1 shows the piece of metal from which the valve is to be made.

'Fig. 2 shows the piece after the end piece has been drawn.

Fig. 3 shows the finished valve after the operation of forming the head.

Figs. 4 and 5 show in detail the tool used for carrying out these two operations, Fig. 4 relating to the drawing of the end piece and Fig. 5- to the formation of the head.

For the drawing operation the tool consists principally (see Fig. 4) of a die a ofthe rod and thickening up.

suitable form fixed to the framework of a press by this die has an opening 6 corresponding to the diameter of the valve rod to be forged. To the piston p or slide block of the press is attached the press tool 0 which fits exactly in the cylindrical portion of the die.

The piece of metal after being heated to the desired temperature, is inserted into the die a at d (dotted lines). The press tool 1. acting on this metal forces the lower part through the hole 0, obtaining a piece similar to that shown in Fig. 2.

To obtain the pressing of the head the tool (Fig. 5) consists principally of a die f of suitable shape fixed in a die-holder 9 secured to the frame h of the press. I

The piston 39' or slide block of the press is provided with a press tool 7' the lower part of which corresponds to the upper face of the head of the valve.

The operation is effected as follows The head of the valve is heated to the desired temperature, the valve is then inserted in the die 7', the press tool j acting on the head and giving the same the desired form.

Itshould be noted that the process of manufacture is simple, presenting no difiiculties in execution and requiring no skilled labor.

Moreover the forged object preserves the lines of the metal in the direction of length, which gives it the maximum security, this being a very important qualification for such objects.

he process of forging above described is applicable to all objects having a head and an end piece such as bolts, rivets, etc.

I claim:

The process of forging valves of the class describe having a head and stem, by first taking a section of metal having a diameter between that of the finished head and stem. heating the same, forcing the hot 'Inetal through a hole in a draw-plate to form the stem, leaving a roughly shaped headand thereafter completely forming said head between a die and suitable press tool.

In testimony whereof I afiix my signature.

' ERNEST FUCHS, E.

RENAULT, 0F BILLANCOURT, 

